It's a drone delivery! This copter is ferrying medicine from a pharmacy to the headquarters of Deutsche Post in Bonn, Germany, part of a test of drone capabilities. Andreas Rentz/Getty Images hide caption

itoggle caption Andreas Rentz/Getty Images

At Resource Management's materials recovery facility, workers pull plastic bags, other trash and large pieces of cardboard off the conveyor belts before the mixed single-stream recyclables enter the sorting machines. Véronique LaCapra/St. Louis Public Radio hide caption

itoggle caption Véronique LaCapra/St. Louis Public Radio

Not many students have the cutting-edge cybersecurity skills the NSA needs, recruiters say. And these days industry is paying top dollar for talent. Brooks Kraft/Corbis hide caption

itoggle caption Brooks Kraft/Corbis

Google is doing test flights of its balloons carrying Internet routers around the world. Last June, a balloon was released at the airport in Teresina, Brazil. Google hide caption

itoggle caption Google

A health inspection grade is posted outside a Manhattan eatery. In several cities, Yelp users can now find out how a restaurant scored on its health inspection well before they walk through the door. Mario Tama/Getty Images hide caption

itoggle caption Mario Tama/Getty Images

The Hartford Police Department is one of a number of police departments across the country that are offering up their parking lots as "safe zones" for Craigslist transactions. Courtesy of the Hartford Police Department hide caption

itoggle caption Courtesy of the Hartford Police Department